Publicou 4 edições por ano
ISSN Imprimir: 2169-2785
ISSN On-line: 2167-857X
Indexed in
DROPLET DYNAMICS AFTER IMPACTING ON HYDROPHILIC POWDER BEDS COMPOSED OF UNIFORM AND NON-UNIFORM SIZE PARTICLES
RESUMO
An experimental investigation is carried out to study the dynamics of a water droplet after its impact on two types of hydrophilic Cu powder beds (with the contact angle of 64° ± 10°), composed of uniform and non-uniform size particles, respectively. It is found that a droplet can infiltrate into a hydrophilic Cu powder bed composed of non-uniform size particles, and its penetration time is independent of the Weber (We) number. A droplet cannot infiltrate into a hydrophilic Cu powder bed composed of uniform size particles. Instead, the droplet bounces from the powder bed of uniform size particles (owing to the non-stick particle-coated surface) and forms a liquid marble. Maximum spread factors εmax on Cu powder beds are found to be smaller than that on a Cu substrate. Based on experimental data, the maximum spread factor on uniform and non-uniform hydrophilic powder beds can be scaled as εmax ~ We1/10 for 1 < We < 10 and as εmax ~ We1/5 for 10 < We < 40, respectively. It is also found that a hydrophilic powder bed, composed of small uniform size Cu particles (with an average diameter of 2.3 μm), behaves almost like a "super−hydrophobic" substrate, where the droplet can jump repeatedly after its impact on the powder bed. The droplet contact time after impacting on this powder bed is equal to the first-order oscillation period of the droplet.
-
Aussillous, P. and Quere, D., Liquid Marbles, Nature, vol. 411, no. 6840, pp. 924-927, 2001.
-
Bormashenko, E., Pogreb, R., Musin, A., Balter, R., Whyman, G., and Aurbach, D., Interfacial and Conductive Properties of Liquid Marbles Coated with Carbon Black, Powder Technol., vol. 203, no. 3, pp. 529-533, 2010.
-
Caviezel, D., Narayanan, C., and Lakehal, D., Adherence and Bouncing of Liquid Droplets Impacting on Dry Surfaces, Microfluid Nanofluid, vol. 5, pp. 469-478, 2008.
-
Emady, H.N., Kayrak-Talay, D., Schwerin, W.C., and Litster, J.D., Granule Formation Mechanisms and Morphology from Single Drop Impact on Powder Beds, Powder Technol., vol. 212, no. 1, pp. 69-79, 2011.
-
Hapgood, K.P., Litster, J.D., Biggs, S.R., and Howes, T., Drop Penetration into Porous Powder Beds, J. ColloidInterf. Sci., vol. 253, no. 2, pp. 353-366, 2002.
-
Josserand, C. and Thoroddsen, S.T., Drop Impact on a Solid Surface, Annu. Rev. FluidMech, vol. 48, no. 48, pp. 365-391, 2016.
-
Katsuragi, H., Length and Time Scales of a Liquid Drop Impact and Penetration into a Granular Layer, J. Fluid Mech., vol. 675, pp. 552-573,2011.
-
Li, X., Wang, Y., Yang, Y., Wang, S., Zang, D., and Geng, X., Dynamic Behavior of Droplets under Interfacial Jamming of Nanoparticles, Appl. Phys. Lett., vol. 113, p. 133702, 2018.
-
Liang, G. and Mudawar, I., Review of Drop Impact on Heated Walls, Int. J. Heat Mass Transf, vol. 106, pp. 103-126, 2017.
-
Marston, J.O., Thoroddsen, S.T., Ng, W.K., and Tan, R.B.H., Experimental Study of Liquid Drop Impact onto a Powder Surface, Powder Technol, vol. 203, no. 2, pp. 223-236, 2010.
-
Marston, J.O., Sprittles, J.E., Zhu, Y., Li, E.Q., Vakarelski, I.U., and Thoroddsen, S.T., Drop Spreading and Penetration into Pre-Wetted Powders, Powder Technol, vol. 239, pp. 128-136, 2013.
-
Marston, J.O., Zhu, Y., Vakarelski, I.U., and Thoroddsen, S.T., Deformed Liquid Marbles: Freezing Drop Oscillations with Powders, Powder Technol, vol. 228, pp. 424-428, 2012.
-
McBride, S.P. and Law, B.M., Influence of Line Tension on Spherical Colloidal Particles at Liquid-Vapor Interfaces, Phys. Rev. Lett, vol. 109, no. 19, p. 196101,2012.
-
McHale, G. and Newton, M.I., Liquid Marbles: Topical Context within Soft Matter and Recent Progress, Soft Matter, vol. 13, pp. 2530-2546, 2015.
-
Ng, B.T., Hung, Y.M., and Tan, M.K., Suppression of the Leidenfrost Effect via Low Frequency Vibrations, Soft Matter, vol. 11, pp. 775-784,2015.
-
Nguyen, T., Shen, W., and Hapgood, K., Drop Penetration Time in Heterogeneous Powder Beds, Chem. Eng. Sci., vol. 64, no. 24, pp. 5210-5221,2009.
-
Oostveen, M.L.M., Meesters, G.M.H., and van Ommen, J.R., Quantification of Powder Wetting by Drop Penetration Time, Powder Technol., vol. 274, pp. 62-66,2015.
-
Rayleigh, L., On the Capillary Phenomena of Jets, Proc. R. Soc. London, vol. 29, pp. 71-97, 1879.
-
Richard, D., Clanet, C., and Quere, D., Surface Phenomena: Contact Time of a Bouncing Drop, Nature, vol. 417, no. 6891, p. 811, 2002.
-
Rioboo, R., Marengo, M., and Tropea, C., Time Evolution of Liquid Drop Impact onto Solid, Dry Surfaces, Exp. Fluids, vol. 33, pp. 112-124,2002.
-
Rioboo, R., Tropea, C., and Marengo, M., Outcomes from a Drop Impact on Solid Surfaces, Atomization Sprays, vol. 11, pp. 155-165,2001.
-
Shirtcliffe, N.J., McHale, G., Newton, M.I., Pyatt, F.B., and Doerr, S.H., Critical Conditions for the Wetting of Soils, Appl. Phys. Lett., vol. 89, no. 9, p. 94101, 2006.
-
Tan, M.X.L., Wong, L.S., Lum, K.H., and Hapgood, K.P., Foam and Drop Penetration Kinetics into Loosely Packed Powder Beds, Chem. Eng. Sci., vol. 64, no. 12, pp. 2826-2836, 2009.
-
Xiong, W., Cheng, P., Quan, X., and Yao, W., Droplet Impact on a Layer of Solid Particles Placed above a Substrate: A 3D Lattice Boltzmann Study, Comput. Fluids, vol. 188, pp. 18-30,2019.
-
Zhao, S.C., de Jong, R., and van der Meer, D., Liquid-Grain Mixing Suppresses Droplet Spreading and Splashing during Impact, Phys. Rev. Lett., vol. 118, no. 5, p. 54502, 2017.
-
Zhao, S., de Jong, R., and van der Meer., D., Raindrop Impact on Sand: A Dynamic Explanation of Crater Morphologies, Soft Matter, vol. 11, no. 33, pp. 6562-6568, 2015.
-
Tkachenko Pavel P., Islamova Anastasya G., Shlegel Nikita E., Strizhak Pavel A., EFFECT OF GAS PRESSURE AND TEMPERATURE ON THE REGIMES OF LIQUID DROPLET COLLISIONS , Interfacial Phenomena and Heat Transfer, 10, 1, 2022. Crossref